/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2019-2021 Payara Foundation and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/main/LICENSE.txt
 * See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at legal/OPEN-SOURCE-LICENSE.txt.
 *
 * GPL Classpath Exception:
 * The Payara Foundation designates this particular file as subject to the "Classpath"
 * exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * If you wish your version of this file to be governed by only the CDDL or
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 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
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package fish.payara.ejb.http.protocol;

import jakarta.json.bind.annotation.JsonbPropertyOrder;

import java.io.Serializable;

/**
 * Response in case of an error.
 *
 * @author Jan Bernitt
 */
@JsonbPropertyOrder({"exceptionType", "message", "cause"})
public class ErrorResponse implements Serializable {

    private static final long serialVersionUID = 1L;

    public String exceptionType;
    public String message;
    public ErrorResponse cause;

    public ErrorResponse() {
        // needed for JSONB de-serialisation
    }

    private ErrorResponse(String exceptionType, String message, ErrorResponse cause) {
        this.exceptionType = exceptionType;
        this.message = message;
        this.cause = cause;
    }

    public ErrorResponse(Throwable ex) {
        this(ex.getClass().getName(), ex.getMessage(), ex.getCause() != null ? new ErrorResponse(ex.getCause()) : null);
    }

    @Override
    public String toString() {
        StringBuilder str = new StringBuilder();
        toString(str);
        return str.toString();
    }

    private void toString(StringBuilder str) {
        str.append(exceptionType).append(": ").append(message);
        if (cause != null) {
            str.append("\ncaused by:\n");
            cause.toString(str);
        }
    }
}
